Bug 2120985 (CVE-2020-27795) - CVE-2020-27795 radare2: segmentation fault leads to a DoS
Summary: CVE-2020-27795 radare2: segmentation fault leads to a DoS
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2020-27795
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2120986 2120987
Blocks:
TreeView+ depends on / blocked
 
Reported: 2022-08-24 09:08 UTC by Marian Rehak
Modified: 2023-02-20 12:46 UTC (History)
2 users (show)

Fixed In Version:
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Environment:
Last Closed: 2022-09-02 18:25:33 UTC
Embargoed:


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Description Marian Rehak 2022-08-24 09:08:12 UTC
A segmentation fault was discovered in radare2 with adf command. In libr/core/cmd_anal.c, when command "adf" has no or wrong argument, anal_fcn_data (core, input + 1) --> RAnalFunction *fcn = r_anal_get_fcn_in (core->anal, core->offset, -1); returns null pointer for fcn causing segmentation fault later in ensure_fcn_range (fcn).

Reference:

https://github.com/radareorg/radare2/commit/4d3811681a80f92a53e795f6a64c4b0fc2c8dd22
https://github.com/radareorg/radare2/pull/16230
https://github.com/radareorg/radare2/issues/16215

Comment 1 Marian Rehak 2022-08-24 09:08:27 UTC
Created radare2 tracking bugs for this issue:

Affects: epel-all [bug 2120987]
Affects: fedora-all [bug 2120986]

Comment 2 Product Security DevOps Team 2022-09-02 18:25:31 UTC
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.


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